team leave @s
team join seeker
tellraw @a [{"selector":"@s","bold":false,"italic":false,"underlined":false,"strikethrough":false,"obfuscated":false},{"text":"加入","color":"white","bold":false,"italic":false,"underlined":false,"strikethrough":false,"obfuscated":false},{"text":"[猫猫]","color":"red","bold":false,"italic":false,"underlined":false,"strikethrough":false,"obfuscated":false}]